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An Nhon

(Encyclopedia)An Nhon: see Quy Nhon, Vietnam.

An Uaimh

(Encyclopedia)An Uaimh, Republic of Ireland: see Navan. ...

chelating agents

(Encyclopedia)chelating agents kēˈlātĭng [key]. Certain organic compounds are capable of forming coordinate bonds (see chemical bond) with metals through two or more atoms of the organic compound; such organic ...

An Lu-shan

(Encyclopedia)An Lu-shan än lo͞o-shän [key], d.757, Chinese general of the T'ang dynasty. Of mixed Sogdian and Turkish birth, he was appointed regional commander on the northeastern frontier. In 755 he led c.200...

An-ch'ing

(Encyclopedia)An-ch'ing än-chĭng [key]: see Anqing, China. ...

Wang An-shih

(Encyclopedia)Wang An-shih wäng än-shûr [key], 1021–86, Chinese Sung dynasty statesman. As a chief councilor (1069–74, 1075–76) he directed sweeping administrative and fiscal reforms that drew strong conse...

anthracene

(Encyclopedia)CE5 anthracene ănˈthrəsēn [key], C14H10, solid organic compound derived from coal tar. It melts at 218℃ and boils at 354℃. When pure it is colorless and has a violet fluorescence; it darken...

Ch'an Buddhism

(Encyclopedia)Ch'an Buddhism: see Zen Buddhism. ...

Wöhler, Friedrich

(Encyclopedia)Wöhler, Friedrich frēˈdrĭkh vöˈlər [key], 1800–1882, German chemist. He studied under the German chemist Leopold Gmelin and J. J. Berzelius, a Swedish chemist, and in 1836 was appointed profe...

anhydride

(Encyclopedia)anhydride ănhīˈdrīd, –drĭd [key] [Gr.,=without water], chemical compound formed by removing water, H2O, from another compound; the anhydride can also react with water to form the original compo...